[Frontend] In-progress checkin:

WTD-894
Added scss file for fixed position styles;
Mods in progress to fixed.html to remove inline styling and change grid method to background gradient approach;

platform/commonUI/general/res/sass/_main.scss

@@ -9,6 +9,7 @@
 @import "global";
 @import "fonts";
 @import "user-environ/layout";
+@import "fixed-position";
 @import "about";
 @import "badges";
 @import "icons";